616521079 has 2 divisors, whose sum is σ = 616521080. Its totient is φ = 616521078.

The previous prime is 616521041. The next prime is 616521089. The reversal of 616521079 is 970125616.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 616521079 - 2⁷ = 616520951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (616521089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308260539 + 308260540.

It is an arithmetic number, because the mean of its divisors is an integer number (308260540).

Almost surely, 2^616521079 is an apocalyptic number.

616521079 is a deficient number, since it is larger than the sum of its proper divisors (1).

616521079 is an equidigital number, since it uses as much as digits as its factorization.

616521079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 616521079 is about 24829.8425085622. The cubic root of 616521079 is about 851.1040228581.

It can be divided in two parts, 6165210 and 79, that added together give a square (6165289 = 2483²).

The spelling of 616521079 in words is "six hundred sixteen million, five hundred twenty-one thousand, seventy-nine".